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What is the correct solution of the inequality \(9-4(x+2)>x-14\)?

Answer and explanation

Correct answer: \(x<3\)

Expanding the bracket gives \(9-4x-8>x-14\), or \(1-4x>x-14\). Simplifying further yields \(15>5x\), so \(x<3\). Therefore, option A is correct. Option C is incorrect because the original inequality is strict, so \(x=3\) is not included. Exam tip: the inequality sign reverses when both sides are divided or multiplied by a negative number, but not when divided by the positive number 5.

Related tags

Linear InequalitiesAlgebraic SimplificationStrict InequalityAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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